<pre>
java.lang.NullPointerException
	at sun.font.FontManager.getFont2D(Native Method)
	at sun.font.FontDesignMetrics.initMatrixAndMetrics(FontDesignMetrics.java:343)
	at sun.font.FontDesignMetrics.<init>(FontDesignMetrics.java:336)
	at sun.font.FontDesignMetrics.getMetrics(FontDesignMetrics.java:284)
	at sun.swing.SwingUtilities2.getFontMetrics(SwingUtilities2.java:984)
	at javax.swing.JComponent.getFontMetrics(JComponent.java:1597)
	at javax.swing.plaf.synth.SynthTabbedPaneUI.getFontMetrics(SynthTabbedPaneUI.java:733)
	at javax.swing.plaf.synth.SynthTabbedPaneUI.getFontMetrics(SynthTabbedPaneUI.java:729)
	at javax.swing.plaf.basic.BasicTabbedPaneUI$TabbedPaneScrollLayout.calculateTabRects(BasicTabbedPaneUI.java:3131)
	at javax.swing.plaf.basic.BasicTabbedPaneUI$TabbedPaneLayout.calculateLayoutInfo(BasicTabbedPaneUI.java:2496)
	at javax.swing.plaf.basic.BasicTabbedPaneUI$TabbedPaneScrollLayout.layoutContainer(BasicTabbedPaneUI.java:2900)
	at java.awt.Container.layout(Container.java:1398)
	at java.awt.Container.doLayout(Container.java:1387)
	at java.awt.Container.validateTree(Container.java:1485)
	at java.awt.Container.validate(Container.java:1457)
	at javax.swing.plaf.basic.BasicTabbedPaneUI.ensureCurrentLayout(BasicTabbedPaneUI.java:1429)
	at javax.swing.plaf.basic.BasicTabbedPaneUI.tabForCoordinate(BasicTabbedPaneUI.java:1470)
	at javax.swing.plaf.basic.BasicTabbedPaneUI.tabForCoordinate(BasicTabbedPaneUI.java:1464)
	at javax.swing.JTabbedPane.getToolTipText(JTabbedPane.java:1725)
	at javax.swing.ToolTipManager$insideTimerAction.actionPerformed(ToolTipManager.java:658)
	at javax.swing.Timer.fireActionPerformed(Timer.java:271)
	at javax.swing.Timer$DoPostEvent.run(Timer.java:201)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
</pre>
